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4 years ago

Which fraction is equivalent to -2/3 2/-3 -3/2 -2/3 2-3

Mathematics

1 answer:

melomori [17]4 years ago

7 0

Answer: -2/3 because its the same fraction

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Hello everyone… Please answer … Let's solve a little logic : )

morpeh [17]

Answer:

Step-by-step explanation:

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3 years ago

Permutations:

ad-work [718]

Permutation is considered an ordered combination. The general formula for this is:

P(n, r) = n! (n-r)!

where:
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3 years ago

Find the solution(s) for x in the equation below. x^2 + 10x + 21= 0

Law Incorporation [45]

The solutions for ‘x’ in the given equation are – 3 and - 7

<u>Step-by-step explanation:</u>

Given equation:

$x^{2} + 10 x + 21 = 0$

To find the ‘x’ value, try to factor, because in this case it works, it's fast. By using factor method, we get

(x + 3) (x + 7) = 0 (adding both value we get 10 and multiply as 21 as in equation and check with signs also while factoring)

x = - 3, -7

Verify above values by multiply both terms,

(x + 3) (x + 7) = 0

$x^{2} + 7 x + 3 x + 21 = 0$

$x^{2} + 10 x + 21 = 0$ (so values obtained from factor method are correct)

Or, can use quadratic formula, for $a x^{2} + b x + c=0$ , the solutions are given by:

$x=\frac{-b \pm \sqrt{b^{2}-4 a c}}{2 a}$

In the given equation, a = 1, b = 10, c = 21, apply these in above formula

$x=\frac{-10 \pm \sqrt{10^{2}-(4 \times 1 \times 21)}}{2(1)}=\frac{-10 \pm \sqrt{100-84}}{2}$

$x=\frac{-10 \pm \sqrt{16}}{2}=\frac{-10 \pm 4}{2}$

So,

When $x=\frac{-10+4}{2}=\frac{-6}{2}=-3$

When $x=\frac{-10-4}{2}=\frac{-14}{2}=-7$

Hence, the values for ‘x’ are - 3 and - 7

7 0

3 years ago

mrs xu lives 10.7 miles away from her place of work. she drives to work and back six days a week. how many miles does she travel

rewona [7]

Answer:

128.4 Miles

Step-by-step explanation:

She goes to work and goes 10.7 miles, and then goes back home aswell which is also 10.7 miles. So total miles in one day = 10.7 + 10.7 = 21.4 miles in one day.

so 1 week = 21.4 x 6

128.4 miles.

we times it by 6 because she works 6 days a week only.

hope it helped :)

5 0

3 years ago

Hey im having ALOT of trouble on this assignment for math theres one question i cant get, its 2+2=

Gnesinka [82]

. . Hmmmmmmmmm, I wonder what the answer could be XD

7 0

3 years ago